Name
SGIX_texture_multi_buffer
Name Strings
GL_SGIX_texture_multi_buffer
Version
$Date: 1995/06/13 23:48:23 $ $Revision: 1.2 $
Number
53
Dependencies
EXT_texture_object affects the definition of this extension
Overview
This extension provides an API for the application to specify that
the OpenGL should handle multiple textures in such a way that,
wherever possible, a texture definition or redefinition can occur
in parallel with rendering that uses a different texture.
The texture_object extension allows the simultaneous definition
of multiple textures; any texture that is not being used for
rendering can, in principle, have its definition or operations
in its definition (e.g. downloading to hardware) occur in parallel
with the use of another texture. This is true as long as all
redefinitions strictly follow any use of the previous definition.
Conceptually this is similar to frame buffer double-buffering,
except that the intent here is to simply provide a hint to the
OpenGL to promote such double-buffering if and wherever possible.
The effect of such a hint is to speed up operations without
affecting the result. The user on any particular system must be
knowledgable and prepared to accept any trade-offs which follow
from such a hint.
GL_FASTEST in this context means that texture multi-buffering
is being used whenever possible to improve performance.
Generally, textures that are adjacent in a sequence of multiple
texture definitions have the greatest chance of being in
different buffers. The number of buffers available at any time
depends on various factors, such as the machine being used and
the textures' internal formats.
New Procedures and Functions
None
New Tokens
Accepted by the parameter of Hint, and by the
parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev:
GL_TEXTURE_MULTI_BUFFER_HINT_SGIX 0x812E
Additions to the Specification
TBD
Additions to the GLX Specification
None
Dependencies on EXT_texture_object
If EXT_texture_object is not implemented, then references to
GL_TEXTURE_MULTI_BUFFER_HINT_SGIX in this specification are void.
Errors
None
New State
Get Value Get Command Type Initial Value Attrib
--------- ----------- ---- ------------- ------
GL_TEXTURE_MULTI_BUFFER_HINT_SGIX GetIntegerv Z3 DONT_CARE -
New Implementation Dependent State
None